This is a dressing I like that has a lot of flavor

1/4 cup White Wine Vinegar
1 TBL Dijon Mustard
a few drops of your favorite hot sauce
1 tsp cajun seasoning

mix all of the above together with a wisk and then slowly add olive oil while continuing to stir. I've seen other recipes that call for a 1/4 cup of olive oil, but I reduce that quite a bit. Usually just a couple table spoons. Other than the olive oil, this recipe has almost no calories so you can make this dressing as lite as you like.